﻿using System;
using System.Collections.Generic;
using System.Text;

namespace Common
{
    public class ToolsByte
    {/// <summary>
        /// 按编码格式将字符串转为16进制字符串
        /// </summary>
        /// <param name="s"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string StrToHexStr(string s, Encoding encode)
        {
            byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符，不足两位的以0补齐
            {
                result += Convert.ToString(b[i], 16).PadLeft(2, '0');
            }
            return result;
        }


        /// <summary>
        /// 按编码格式将16进制字符串恢复为字符串
        /// </summary>
        /// <param name="hs"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string HexStrToStr(string hs, Encoding encode)
        {
            byte[] b = HexStrToToHexByte(hs);
            return encode.GetString(b);
        }

        /// <summary>
        /// 按编码格式将16进制字符串截取部分恢复为字符串
        /// </summary>
        /// <param name="hs"></param>
        /// <param name="startIndex"></param>
        /// <param name="lenght"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string HexStrToStr(string hs, int startIndex, int lenght, Encoding encode)
        {
            string str = hs.Substring(startIndex, lenght);
            return HexStrToStr(str, encode);
        }

        public static string SubHexStr(string hs, int startIndex, int lenght)
        {
            string str = hs.Substring(startIndex, lenght);
            return str;
        }


        /// <summary>
        /// 将16进制字符串转16进制字节数组
        /// </summary>
        /// <param name="hexString"></param>
        /// <returns></returns>
        public static byte[] HexStrToToHexByte(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if ((hexString.Length % 2) != 0 && hexString.Length > 0)
                hexString = hexString.Substring(0, hexString.Length - 1);
            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            return returnBytes;
        }


        /// <summary>
        /// 将16进制字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string HexByteToHexStr(byte[] bytes)
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i++)
                {
                    returnStr += bytes[i].ToString("X2");
                }
            }
            return returnStr;

        }

        public static List<string> StringToList(string str, int childLength)
        {
            List<string> result = null;
            if (str.Length % childLength == 0)
            {
                result = new List<string>();
                for (int i = 0; i < str.Length; i += childLength)
                {
                    result.Add(str.Substring(i, childLength));
                }
            }
            return result;
        }


        /// <summary>
        /// 从汉字转换到16进制
        /// </summary>
        /// <param name="s"></param>
        /// <param name="charset">编码,如"utf-8","gb2312"</param>
        /// <param name="fenge">是否每字符用逗号分隔</param>
        /// <returns></returns>
        public static string ChineseToHexStr(string s, string charset)
        {
            System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
            byte[] bytes = chs.GetBytes(s);
            string str = "";
            for (int i = 0; i < bytes.Length; i++)
            {
                str += string.Format("{0:X}", bytes[i]);
            }
            return str.ToUpper();
        }


        ///<summary>
        /// 从16进制转换成汉字
        /// </summary>
        /// <param name="hex"></param>
        /// <param name="charset">编码,如"utf-8","gb2312"</param>
        /// <returns></returns>
        public static string HexStrToChinese(string hex, string charset)
        {
            if (hex == null)
                throw new ArgumentNullException("hex");
            hex = hex.Replace(",", "");
            hex = hex.Replace("\n", "");
            hex = hex.Replace("\\", "");
            hex = hex.Replace(" ", "");
            if (hex.Length % 2 != 0)
            {
                hex += "20";//空格
            }
            // 需要将 hex 转换成 byte 数组。
            byte[] bytes = new byte[hex.Length / 2];

            for (int i = 0; i < bytes.Length; i++)
            {
                try
                {
                    // 每两个字符是一个 byte。
                    bytes[i] = byte.Parse(hex.Substring(i * 2, 2),
                    System.Globalization.NumberStyles.HexNumber);
                }
                catch
                {
                    // Rethrow an exception with custom message.
                    throw new ArgumentException("hex is not a valid hex number!", "hex");
                }
            }
            System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
            return chs.GetString(bytes);
        }
    }
}
